Apple has just rolled out the much needed supplemental update for OS X El Capitan beta 3 to fix unexpected crashes in 32-bit apps within a day after it released the third beta for testing to members of the Apple Beta Software Program.

According to the official release notes, the supplemental update fixes an issue that may cause some 32-bit apps to quit unexpectedly.

The update can be installed on all Macs running public beta of El Capitan via the Updates tab on Mac App Store, while another dedicated update will address pronunciation and clarity improvements to the Samantha voice in El Capitan.

OS X El Capitan is expected to be released alongside iOS 9 in the fall. It is proposed to bring a handful of performance, stability and reliability updates to Apple's desktop operating system, while enhancing the system security at the same time.

Apple's new San Francisco font substitutes the dated Helvetica Nueue as the new default typeface for Macs across the system menus, dialog boxes, lists and other user interface elements in El Capitan.

Other key features that deserve a mention include a revamped Mission Control with new Split Screen Window mode, Apple Maps with Transit directions, an enhanced Mail app with gesture support, more versatile Spotlight search, a new powerful Notes app and iOS's Metal framework for fast and fluid graphics.